Having owned both, I loved the DR whilst I had it, it was certainly light and the double side-entry doors provide hassle free access for two people, but the tapering towards the top does limit the internal space.
The SS2 on the other hand, is a veritable palace! Its vestibules are huge, internal space is extremely generous, and access is outstanding. Staking to achieve ridgeline tension has not proved an issue - it would be no more than the tension needed to pitch a tarp, for example. There is also the flexibility to pitch the inner (net) tent only, important for us in the subtropics. I will be first to queue up for a solid inner too, for cold weather use. A solid inner as well as the net tent would make this a truly flexible shelter system.
SS2 gets my vote without question!
Thanks Henry for a sensational design. My GF quipped when she first saw it "How did they get this tent - stitch two halves together the wrong way??" Gear freaks will be amused by the next part of the quote "So this looks like a tent that KK doesn't have - she'll buy one! Let's put it on the market!!"
Seriously, it's a great tent.